$5\left(-1\right)\left(3\right)$
$\left(3b+\frac{2}{7}c\right)^2$
$\frac{5x+2}{7x^2}-\frac{8x+2}{7x^2}$
$\left(2x+5y\right)\left(2x-y\right)$
$\left(\frac{s^2-2s+5}{\sqrt{s}}\right)$
$\lim_{n\to\infty}\sqrt{\frac{3n^2+1}{n^2+n+2}}$
$\int7fdf$
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